Blog / article campaign can be 5-8 bounty.
If you focus your attention exclusively on blog/article campaigns, you can do many more. A solid writer can easily write one article daily, even more. I mean, most of the campaigns require from 300 to 500 words articles, which is something a skillful writer with solid knowledge of crypto terminology can write within one or two hours. But, of course, if you also participate in social media campaigns, 5-8 articles a month sounds reasonable.
And after you write your 30 articles a month, you'll be lucky if even 3 of them do not turn out to be scams and actually pay you $70 each after the ICO price crashes 10 times.